Naya Hushblade is a common Creature — Elf Rogue card from Alara Reborn (ARB), collector number 141. Current market price: $0.20 (foil $0.61), TCGplayer market prices via Scryfall.
As long as you control another multicolored permanent, this creature gets +1/+1 and has shroud. (It can't be the target of spells or abilities.)